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perf llvm: Return -ENOMEM when asprintf() fails

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[ Upstream commit c435c166dcf526ac827bc964d82cc0d5e7a1fd0b ]

Zhihao sent a patch but it made llvm__compile_bpf() return what
asprintf() returns on error, which is just -1, but since this function
returns -errno, fix it by returning -ENOMEM for this case instead.

Fixes: cb76371441 ("perf llvm: Allow passing options to llc ...")
Fixes: 5eab5a7ee0 ("perf llvm: Display eBPF compiling command ...")
Reported-by: Hulk Robot <[email protected]>
Reported-by: Zhihao Cheng <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andrii Nakryiko <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Nathan Chancellor <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Yu Kuai <[email protected]>
Cc: [email protected]
Link: http://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
This commit is contained in:
Arnaldo Carvalho de Melo 2021-07-01 14:20:58 -03:00 • committed by Greg Kroah-Hartman
commit 00d38f7031
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/llvm-utils.c
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@ -502,6 +502,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
goto errout;
}
err = -ENOMEM;
if (asprintf(&pipe_template, "%s -emit-llvm | %s -march=bpf %s -filetype=obj -o -",
template, llc_path, opts) < 0) {
pr_err("ERROR:\tnot enough memory to setup command line\n");
@ -522,6 +523,7 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf,
pr_debug("llvm compiling command template: %s\n", template);
err = -ENOMEM;
if (asprintf(&command_echo, "echo -n \"%s\"", template) < 0)
goto errout;